Oh my.
Bild is basing on an internal BW paper yesterday - and all others yesterday copied from Bild.
They even said that.
The story unfolded in two stages. Yesterday was second stage.
First stage was three weeks ago. When Spiegel, Focus, Welt and others first mentioned the issue. But three weeks ago the given description was a bit tamer. The description now is worse.
The "one third issue", the formulation was "um ein Drittel". And that translates into "by one third". The conbfusion is increasingk, since others said "um bis zu zwei Drittel". I do not rule out that some clever journalist again messed up their number understanding: from full - reducing by one third - down to two third remaining, or vice versa. Its is journalists writing the articles, most likely those that suually write celver comments on economy, poltiicans and their famous quotes and the latest dress of Merkel or Ashton.
The 1,2 meter claim was by a former BW soldier in one of the military or veteran or Bundeswehr blogs there are in German. There were many popping up on the issue when googling with "G36 heiß präzision" or a combination like that.
Other such entries explained that the heavy use of multipolymeric materials (plastic) blocks heat transportation and cooling, or leads to inner distortion of the weapon frame. The prohblem is not the barrel wich is said to be of solid quality (and of cours enot made of plastic!), but the frame and the way it messes up the cooling of the barrel. Not just with the G36, but many other latest generation weapons making heavy use of these materials.